我们想知道食物与被污染的表面接触的时间长短是否会影响细菌转移到食物上的速度。
We wanted to know if the length of time food is in contact with a contaminated surface affected the rate of transfer of bacteria to the food.
本文综述了粗糙表面接触的研究进展。
Advances in studies on contacts of rough surfaces are reviewed in this paper.
粗糙表面接触研究是一门年轻的交叉学科。
The study of contacts of rough surfaces is a young and interdisciplinary field.
必须提供手段保持从动件与凸轮表面接触。
Means must be provided for keeping the follower in contact with the cam surface.
液体燃料也只有在其表面接触空气时才会燃烧。
Liquid fire also burn only when the surface of the liquid is in contact with the air.
如果可能的话，塑件的光洁面不要与模具表面接触。
If possible, plastic parts of the light cleansing surface and mold contact.
与钢带表面接触的托辊，护辊均采用聚氨脂包胶处理。
The surface of supporting roll and guiding roller, which contact with coiled metal, are covered with PU.
电机转轴锥度面表面接触率是电机的一项重要质量指标。
The contact ratio of the motor shaft taper surface is one of the significant factor for improving the quality of a motor.
金属表面接触是由适当的粘度与油膜形成的复合物所控制。
Metal-to-metal contact is controlled by proper viscosity selection and use of film-forming compounds.
菌细胞密度、表面接触和生理学信号均可成为群集运动的刺激因素。
Bacterial density, surface contact and physiological signals are stimulating factors of swarming motility.
当读写头的表面或表面上的微粒与磁盘表面接触时会发生磁头划伤。
A head crash happens when the surface of the read-write head or particles on its surface contact the magnetic disk surface.
键槽轮毂的锥孔应至少有70%的着色（表面接触）转移到锥度计上？
Tapered bores for keyed hubs shall have a minimum of 70% transfer of bluing (surface contact) to the taper gage.
提出了材料表面接触电阻的测试方法，测试了几种典型材料的表面接触电阻；
The method is presented to test DC contact resistance of shielding materials' surface.
这些充了电的液滴与指纹表面接触后会吸走其表现上存积的任何物质，产生一块液体薄膜。
When these charged droplets come into contact with the surface of the print they collect any substances deposited on it, creating a thin liquid film.
这项研究发现，五秒钟定律有一定道理，食物同表面接触时间越长，沾染的细菌就会越多。
The research found that the five-second rule has some validity in that longer contact times resulted in transfer of more bacteria.
轮带发生剥落掉块的原因主要是表面接触疲劳破坏，处理剥落掉块的方法主要是现场焊接。
The main reason for tyre peeling consists in fatigue failure during surface contacting, and the remedial measure to tyre peeling consists mainly in welding on site.
传感器采用贴面形式安装在物体表面，固定形式为螺纹或法兰，并确保与设备表面接触严密。
The sensor shall be mounted on object surface, by fixation of screw thread or flange, and ensure firm contact with the equipment surface.
这尤其会出现在以下地带：受热侵袭的地方或者需延长和材料表面接触时间的残留物存在处。
This is particularly applicable in those zones that are either heat affected or have had residues remain in contact with the metal surface for prolonged periods.
前者是几个不连续的小幅值电流脉冲，主要是使表面接触均匀化，接触电阻稳定在一个较小值；
The former consists of several discontinuous minor amplitude current impulses, which is used to uniformize contact area and to make contact resistance stabilized on a small value;
航空轴承外圈的疲劳裂纹分析表明，套圈表面的残余压应力分布致使轴承表面接触疲劳寿命降低。
The analysis on fatigue cracks of the outer race of aero-bearing shows that the distribution of residual tensile stress on race surface could reduce its contact fatigue life.
与混凝土表面接触时间长，保证了在高等级混凝土中的渗透深度，而且在其表面不会残留任何痕迹。
It penetrates even high grade concrete effectively, prevents water and Chloride ingress and leaves no visible residues on the surface.
表面接触电阻是材料的固有属性，是材料本身的电性能所决定的，可作为材料屏蔽效能的衡量标准。
The resistance is mental nature property, which is determined by material's performance, and it can act as standard of material's shielding effectiveness.
气浮导轨是借助有一定压力的空气使工作台悬浮，并且不与导轨表面接触的一种导轨形式，工作时的摩擦力几乎为零。
Aerostatic slideways can make the worktable hanging by the aid of the definite stressed air, which don't come in contact with the slideways surface so that there isn't nearly friction working.
一旦接触土壤表面，这条“鼻涕虫”就会发生另一种变形。
Once it reaches the surface of the soil, the "slug" undergoes another transformation.
一些已经从地球表面消失了，其他的正在慢慢地死亡，但所有的都经历了变化，因为它们已经接触到一个不断扩张的机器文明。
Some have vanished from the face of the earth, others are dying slowly, but all have undergone changes as they have come into contact with an expanding machine civilization.
当手指接触一个表面时就形成了指纹。
当手指接触一个表面时就形成了指纹。
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